New clues are emerging about the mysterious streaks that appear on Mars' surface during warm weather, though scientists still can't say for sure that they're caused by flowing water. The marks, known as recurring slope lineae (RSL), snake down some c...

An ambitious project that aims to send volunteers on a one-way trip to Mars unveiled plans for the first private unmanned mission to the Red Planet Tuesday, a robotic vanguard to human colonization that will launch in 2018. The non-profit Mars One fo...

The site where NASA’s Mars rover Curiosity landed last year contains at least one lake that would have been perfectly suited for colonies of simple, rock-eating microbes found in caves and hydrothermal vents on Earth. Analysis of mudstones in an area...

NASA's trigger-happy Curiosity rover has fired its 100,000th laser shot on Mars, a science milestone in its mission to determine what rocks on the Red Planet are made of, NASA announced Thursday. Each laser pulse shot by the Curiosity rover packs the...

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